OOPS!
In my recent posting, I proved that human memory is a very fallible thing. I
stated that in the failed GFCI outlet I examined, the sense coil measured
current in the GROUND conductor. Thankfully, Jim Eichner pointed out that
such a circuit would not fulfill the most important need for a
Yes, lightning can damage GFCIs I had one destroyed in my house. It punched a
hole from a phase electrode right into the side of the solenoid and out the
other to ground. Not much that lightning can't take out.
The test you suggested is just that done by the test button. It connects a
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